Re: Thinkpad suspend-to-disk regression

["Rafael J. Wysocki" <rjw@sisk.pl>]

On Wednesday, 25 April 2007 04:25, Guilherme Salgado wrote:
> On 4/24/07, Rafael J. Wysocki <rjw@sisk.pl> wrote:
> > On Tuesday, 24 April 2007 20:29, Guilherme Salgado wrote:
> > > (I've already sent this to linux-acpi but got no response so far, so I
> > > thought it could be a good idea to send directly to you)
> > >
> > > Hi there,
> > >
> > > I recently noticed that my thinkpad T60 would lose the sound after
> > > being suspended to disk (https://launchpad.net/bugs/80893), requiring
> > > a cold restart to fix it. After some git-bisect work I found this
> > > regression was a consequence of
> > > http://git.kernel.org/?p=linux/kernel/git/lenb/linux-acpi-2.6.git;a=commitdiff;h=9185cfa92507d07ac787bc73d06c42222eec7239
> > > (patch inlined here)
> > >
> > > Is there any chance of fixing the regression this introduced without
> > > reverting it? Please let me know if you want any other info or have a
> > > patch for me to try.
> >
> > You don't need a patch, I think.  Please try
> >
> > # echo shutdown > /sys/power/disk
> >
> > before the suspend (assuming you use the built-in swsusp).  If that works,
> > just make your configuration scripts echo 'shutdown' to /sys/power/disk at
> > system startup.
> >
> 
> I use Ubuntu's default /etc/acpi/hibernate.sh, which already sets
> /sys/power/disk to shutdown before echoing "disk" to /sys/power/state.

In that case it's impossible that the commit you have identified causes the
problem to happen.

It doesn't even touch the 'shutdown' code path.

Greetings,
Rafael